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/*************************************************************************
Jaleco Exerion
*************************************************************************/
#define EXERION_MASTER_CLOCK (XTAL_19_968MHz) /* verified on pcb */
#define EXERION_CPU_CLOCK (EXERION_MASTER_CLOCK / 6)
#define EXERION_AY8910_CLOCK (EXERION_CPU_CLOCK / 2)
#define EXERION_PIXEL_CLOCK (EXERION_MASTER_CLOCK / 3)
#define EXERION_HCOUNT_START (0x58)
#define EXERION_HTOTAL (512-EXERION_HCOUNT_START)
#define EXERION_HBEND (12*8) /* ?? */
#define EXERION_HBSTART (52*8) /* ?? */
#define EXERION_VTOTAL (256)
#define EXERION_VBEND (16)
#define EXERION_VBSTART (240)
class exerion_state : public driver_device
{
public:
exerion_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag) ,
m_main_ram(*this, "main_ram"),
m_videoram(*this, "videoram"),
m_spriteram(*this, "spriteram"){ }
/* memory pointers */
required_shared_ptr<UINT8> m_main_ram;
required_shared_ptr<UINT8> m_videoram;
required_shared_ptr<UINT8> m_spriteram;
/* video-related */
UINT8 m_cocktail_flip;
UINT8 m_char_palette;
UINT8 m_sprite_palette;
UINT8 m_char_bank;
UINT16 *m_background_gfx[4];
UINT8 *m_background_mixer;
UINT8 m_background_latches[13];
/* protection? */
UINT8 m_porta;
UINT8 m_portb;
/* devices */
cpu_device *m_maincpu;
DECLARE_READ8_MEMBER(exerion_protection_r);
DECLARE_WRITE8_MEMBER(exerion_videoreg_w);
DECLARE_WRITE8_MEMBER(exerion_video_latch_w);
DECLARE_READ8_MEMBER(exerion_video_timing_r);
DECLARE_CUSTOM_INPUT_MEMBER(exerion_controls_r);
DECLARE_INPUT_CHANGED_MEMBER(coin_inserted);
DECLARE_READ8_MEMBER(exerion_porta_r);
DECLARE_WRITE8_MEMBER(exerion_portb_w);
DECLARE_DRIVER_INIT(exerion);
DECLARE_DRIVER_INIT(exerionb);
virtual void machine_start();
virtual void machine_reset();
virtual void video_start();
virtual void palette_init();
UINT32 screen_update_exerion(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
};
/*----------- defined in video/exerion.c -----------*/
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